A scale for cross-language comparisons seems a hard ask because everyone is implicitly interested in answering different questions. Which languages do people en

A scale for cross-language comparisons seems a hard ask because everyone is implicitly interested in answering different questions. Which languages do people enjoy using the most? Which have the most code "out there" in some setting or other (open source, commerce, in deployment, scripting, ...)? Which have the most engaged and vocal communities? Which have the biggest pool of skilled workers? which will I get the most career benefit from learning? Perhaps the useful information is more in the correlations between different related metrics, than in drawing up ranked lists (surprise surprise, Java > Haskell!). This graph helps visualise the correlation between these two, which seems significant but far from perfect. Outliers like SQL can then be identified, which point to problems with the metrics (e.g. with SQL, presumably github fails to spot lines of SQL embedded in other langauges).